Heirloom Tomato Sandwich

Ingredients

• 120 ml (½ cup)mayonnaise
• 80 ml (⅓ cup), packedfresh mixed chives, basil and parsley
• 2 clovesgarlic
• 15 ml (1 tbsp)olive oil
• 2.5 ml (½ tsp)fresh lemon juice
• 4–5 slices, 1.3 cm (½ inch) thickcrusty bread, such as pane Italian bread, ciabatta or rustic bakery-style bread
• 2–3heirloom tomatoes, sliced
• To tasteolive oil
• To tastekosher salt and freshly ground black pepper

Instructions

1. 1

   Blend the aioli

   Put the mayonnaise, herbs, garlic, 1 tablespoon of olive oil and lemon juice in a food processor. Pulse until smooth and combined, then cover and refrigerate until you are ready to serve.

2. 2

   Heat the oven

   Preheat the oven to 200°C (400°F).

3. 3

   Toast the bread

   Arrange the bread slices in a single layer on a baking sheet and brush both sides with olive oil. Bake for 12–15 minutes, until crisp and browned, then remove and leave to cool. Alternatively, toast the bread in a bread toaster.

4. 4

   Assemble and serve

   Spread the aioli over the toast, using as much as you like. Arrange tomato slices on top and season with salt and pepper to taste. Drizzle with a little olive oil and serve immediately.

What is an heirloom tomato sandwich?

This open-faced sandwich is a summery take on tomato toast, built from bread, sliced tomatoes and a savoury spread. It draws on the straightforward American tradition of making ripe seasonal produce the focus of a quick meal.

Here, garlic, lemon and fresh herbs give mayonnaise a bright, aioli-like character. Crisp toast helps support the juicy tomatoes, while the finishing oil and seasoning bring the flavours together.

Nutrition and macros by portion

The nutrition label shows one serving as written: 297 calories, 3g protein, 10g carbs, 28g fat.

The bread supplies most of the carbohydrates, while mayonnaise and olive oil provide most of the fat. The tomatoes and herbs add freshness, but this serving is relatively low in protein; pair it with beans, eggs or another protein-rich side to make a more balanced plate.

Choosing the bread and tomatoes

Bread: Choose a sturdy, crusty loaf such as ciabatta or rustic bakery-style bread, sliced about 1.3 cm thick. A firm slice will hold the toppings better than a soft, thin one.

Tomatoes: Use ripe heirloom tomatoes and slice them evenly so they sit neatly on the toast. If they are very juicy, let excess juice run off briefly before assembling.

Getting a smooth herb aioli

Herbs: The combination of chives, basil and parsley gives the spread a fresh, savoury flavour. Pack the herbs into the measuring cup as directed, then pulse them with the other ingredients until the mixture is smooth.

Garlic and lemon: Two cloves provide a noticeable garlic flavour, while a little lemon juice adds brightness. Taste the finished spread before serving if you want to check its balance.

Toasting for the right texture

Oil: Brush both sides of each slice with olive oil for even browning. A light, even coating is enough; too much can leave the bread greasy.

Doneness: Bake at 200°C for 12–15 minutes, checking for crisp, browned edges. The exact timing can vary with the bread and oven, so use the texture and colour as your guide.

Assembling just before serving

Order: Let the toast cool after baking, then spread it with the aioli and add the tomato slices. Finish with salt, pepper and a small drizzle of olive oil.

Timing: Assemble the sandwiches close to serving time so the tomato juices do not soften the toast. You can prepare the aioli ahead and keep it covered in the refrigerator.

What to serve alongside

A crisp green salad or lightly dressed leaves make an easy companion to the rich spread and ripe tomatoes. For a more substantial meal, serve the toast with a bowl of soup or a simple plate of seasonal vegetables.

Recipe notes & tips

• Use tomatoes that are ripe but still hold their shape when sliced.
• Chill the aioli covered if you make it ahead.
• Brush the bread evenly on both sides so it browns consistently.
• Check the toast towards the end of the 12–15-minute baking time.
• Add the tomatoes and seasoning just before serving to keep the bread crisp.

Variations

• Add burrata: Place torn burrata over the tomatoes for a creamy topping.
• Use one herb: Make the aioli with basil, parsley or chives alone.
• Add chilli: Stir a little chilli into the aioli for gentle heat.
• Try sourdough: Use thick slices of sourdough in place of rustic bakery bread.
• Finish with balsamic: Add a small drizzle of balsamic vinegar before serving.

Common mistakes to avoid

• Soft bread: Thin or tender slices can buckle under the toppings; choose a sturdy loaf and cut it about 1.3 cm thick.
• Uneven toasting: Skipping the oil on one side can leave the bread less crisp; brush both sides before baking.
• Overbaking: Bread can turn too hard if left in the oven; start checking at 12 minutes.
• Watery topping: Very juicy tomatoes can soften the toast; let excess juice drain before assembling.
• Soggy toast: Spreading and topping the bread too early lets moisture soak in; assemble just before serving.

How to store

Refrigerate leftover aioli in a covered container and use within 3 days. Store untoasted bread separately at room temperature; assembled sandwiches are best eaten immediately and do not keep their crisp texture well.

Frequently asked questions