Pumpkin and Ricotta Stuffed Shells - Chew Nibble Nosh

Ingredients

• 1 Tbsp. butter
• 3/4 cup onion, diced
• 2 cloves garlic, minced
• 24 jumbo pasta shells
• olive oil
• 2 1/2 cups low-fat or fat-free ricotta cheese
• 1 (15 oz.) can pumpkin puree
• 1 cup grated parmesan cheese
• 1 large egg white
• 1 cup fresh basil, finely chopped
• 1 Tbsp. finely chopped fresh sage
• 1 tsp. salt
• 1 tsp. pepper
• 1 (26 oz.) jar store-bought tomato sauce