Ingredients
- 1 pound ground mild Italian sausage
- 1 (28-oz.) can crushed tomatoes
- 1 ½ teaspoons dried Italian seasoning
- 1 teaspoon kosher salt, divided
- 1 (16-oz.) container ricotta cheese
- 1 large egg
- 8 ounces (2 cups) shredded mozzarella cheese, divided
- 6 ounces no-boil lasagna noodles
- 7 cups loosely packed baby spinach (about 5 oz.), divided
- 2 tablespoons chopped fresh basil leaves
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