Chicken and Spinach Lasagna

Name: Chicken and Spinach Lasagna
Ingredients: 1 lb. (500 g) boneless, skinless chicken breasts; 2 Tbs. extra-virgin olive oil; 2 shallots, minced; 3 garlic cloves, minced; 4 cups (4 oz./125 g) spinach leaves; Kosher salt and freshly ground pepper; 2 1/2 cups (1 1/4 lb./625 g) ricotta cheese; 1/4 cup (1/3 oz./10 g) chopped fresh basil, plus whole leaves for garnish; 1 jar (1 lb. 9 oz./709 g) tomato basil pasta sauce; 1/2 lb. (250 g) fresh pasta, cut into lasagna noodles, or 1/2 lb. (250 g) no-boil lasagna noodles; 2 cups (8 oz./250 g) shredded mozzarella cheese