Cheesy Broccoli Bake

Ingredients

• 2 pounds fresh broccoli, trimmed and cut up
• 1/4 cup chopped celery
• 1/4 pound fresh mushrooms, sliced
• 1/4 cup chopped onion
• 2 tablespoons butter
• One 8-ounce can sliced water chestnuts
• One 10 3/4-ounce can condensed cream of mushroom soup
• 1/2 pound Velveeta
• 1/2 teaspoon garlic salt
• 1/4 teaspoon pepper
• 1 cup grated Cheddar cheese