Name: Tomato Sandwich with Basil Mayo
Prep time: 25 min
Total time: 25 min
Yield: 2 Sandwiches
Cuisine: American

Cooking with Conks Verified

February 2, 2026

This Tomato Sandwich with Basil Mayo is the ultimate summer lunch! There’s something particularly delicious and satisfying about summer ripe tomatoes and mayo sandwiched together between slices of thick, crusty bread, the juice running down your arms as you go in for another bite. It’s even better with our lemony basil mayo, one of our favorite sandwich condiments. Add some shaved parmesan and you’ve taken a simple classic sandwich and made it into one you’ll be dreaming about all summer.

From the Cook

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Tomato Sandwich with Basil Mayo

Cooking with Conks Verified

Ingredients

WarningMilk and 5 other allergens identified

Instructions

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Basil Mayo

In a high sided container, add the mayo, lemon juice, pepper, and basil and blend it all up with an immersion blender.

Note: This recipe makes about 1 cup of basil mayo, which is enough for 4 to 6 sandwiches.

Sandwich

Spread about 2 tablespoons of basil mayo on two of the pieces of lightly toasted bread.

Place 2 thick slices of tomato on top of the basil mayo and season the tomatoes with flaky sea salt and cracked black pepper.

Arrange the parmesan shavings on top of the tomatoes.

Spread 2 more tablespoons of basil mayo onto the other bread slices and use the bread to top each sandwich.

Cut the sandwiches in half and enjoy!

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Tips & Tricks (5)

Tomato Selection Magic 🍅
Choose peak-of-season heirloom tomatoes that are ripe but still firm, with vibrant color and a slight give when gently pressed - this ensures maximum flavor and texture.
Mayo Infusion Technique 🌿
Finely chop fresh basil and let it sit in the mayonnaise for 15-30 minutes before assembling the sandwich to allow the herbs to fully release their aromatic oils.
Bread Toasting Perfection 🍞
Lightly toast sourdough bread until golden and crisp, then let it cool for 2-3 minutes to prevent soggy bread while maintaining a crunchy texture.
Salt Layer Strategy 🧂
Sprinkle flaky sea salt directly on sliced tomatoes 5 minutes before assembling to draw out moisture and concentrate the tomato's natural sweetness.
Parmesan Shaving Hack 🧀
Use a vegetable peeler to create delicate, paper-thin parmesan shavings that will melt slightly from the tomato's warmth and distribute more evenly across the sandwich.

Intelligent Tags

About the Cook

Cooking with Conks

We’re Rachel & Emily Conklin (“Conks” for short), sisters, lifelong foodies, and the voices behind Cooking with Conks. We grew up in Southern California, surrounded by bold flavors, big family meals, and the kind of kitchen chaos that turns into inside jokes