Tuscan Pasta with Sausage, Escarole & White Beans

WHAT YOU'LL NEED

• 2 Tbsp. olive oil
• 1 lb. sweet or hot Italian sausage links, removed from casing and crumbled
• 1 medium onion, sliced
• 10 cloves garlic, finely chopped
• 1/4 tsp. crushed red pepper flakes
• 1 tsp. fennel seeds (optional)
• 1 can (14.5 oz.) diced tomatoes
• 1 large head escarole, coarsely chopped (about 4 cups)
• 1 can (15.5 oz.) cannellini beans
• 2 Knorr® Chicken flavored Bouillon Cube(s), crumbled
• 1 lb. penne pasta or rigatoni pasta, cooked and drained
• 1/2 cup grated Parmesan cheese