Ham And Egg Pizza

Ingredients

• 1 cup cubed fully cooked ham
• 1 can (8 ounces) water chestnuts, drained and finely chopped
• 1 can (2-1/4 ounces) sliced ripe olives, drained
• 3 green onions, chopped
• 2 tablespoons butter
• 6 eggs
• 1/4 cup water
• Salt and pepper to taste
• 1 prebaked 12-inch pizza crust
• 1 medium tomato, seeded and diced
• 1/3 cup shredded part-skim mozzarella cheese
• 1/3 cup shredded cheddar cheese