Turn on the broiler in your oven. Place bread slices on a baking sheet, drizzle with olive oil and sprinkle with garlic powder. Cook until golden brown in the oven.
In a small bowl, add the ricotta cheese, mascarpone cheese, lemon zest, 3 tbsp of olive oil, a pinch of salt and pepper, mix together and taste. Add additional salt if needed for taste.
In a second bowl, add the tomatoes, onion, and basil, mixed together and season with salt and pepper and a pinch of garlic powder, then drizzle with a touch of olive oil.
Taste and add additional seasoning if needed. To plate, place bread slices on a serving plate. Spread the mascarpone cheese and ricotta mixture over the top. Finish with the tomato mixture and garnish with extra basil as needed. Serve and have fun!
