Seafood & Potato Chowder

Ingredients

• 1 cup diced onion
• 1 (28 ounce) candiced potatoes, drained
• 1 (13 1/4 ounce) can sliced mushrooms, drained
• 1 cup butter (I use margarine) or 1 cup margarine (I use margarine)
• 1 cup flour
• 2 (6 1/2 ounce) cans clams, do NOT drain
• 1 (4 1/4 ounce) can shrimp, do NOT drain
• 1 (6 ounce) can crab, do NOT drain
• 1 teaspoon lemon pepper
• 1 quart chicken broth or 1 quart stock
• 1 quart half-and-half