Preheat your oven to 375°F (190°C).
Boil water in a large pot and cook the lasagna sheets according to the package instructions. Once al dente, drain and lay them flat on a clean towel to cool.
In a mixing bowl, combine the well-drained ricotta cheese with a pinch of salt and pepper. Stir until creamy and set aside.
Drizzle a little extra-virgin olive oil into each muffin cup to prevent sticking.
Cut the lasagna sheets into squares that will fit the muffin tin. Place a square in the bottom of each muffin cup. Layer with a spoonful of marinara sauce, a dollop of ricotta mixture, some cubed mozzarella, and a few basil leaves. Repeat the layering process until the cups are filled, finishing with marinara and mozzarella on top.
Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until the tops are golden and bubbling.
Remove from the oven and let the lasagna cups cool for a few minutes before gently removing them from the muffin tin. Serve warm, garnished with additional basil if desired.