Squash Casserole

Ingredients

• 3 medium-sized squash
• 1/2 tsp. salt
• 2 Tbsp. butter or margarine
• 1/2 c. sour cream
• 1 small onion
• grated Cheddar cheese
• 1/2 can cream of mushroom soup
• 1/8 tsp. black pepper
• 6 to 8 crushed saltine crackers
• 1 small bag dressing