Peel the garlic and press it through a garlic press. Wash spinach thoroughly, chop coarsely. Heat 1 tablespoon of olive oil. Sauté the garlic in it. Add the spinach and let it collapse.
Season with salt and pepper. Mix ricotta and egg yolk. Wash, clean, quarter and seed the tomatoes. Cut the flesh into small cubes and mix with 1 tablespoon of olive oil. Cook lasagne sheets in salted water for 3-4 minutes.
Then drain well. Brush the baking tray with 1 tablespoon of olive oil. Spread 4 leaves over it once folded over. Arrange spinach, diced tomatoes and ricotta alternating with the remaining pasta sheets.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 12 minutes. Serve garnished with basil.