Lasagna Rolls

Name: Lasagna Rolls
Ingredients: 1 small onion; 1 small carrot; 3 links Italian turkey sausage; 2 tsp. minced garlic; ½ tsp. salt; ½ tsp. fennel seeds; 2¼ c. frozen cut leaf spinach; 1 c. part-skim ricotta cheese; ⅓ c. grated Parmesan cheese; 8 oven-ready lasagna noodles (from an 8- or 9-oz box); 2½ c. bottled marinara sauce; ¾ c. chicken broth