Heat up a cooking pan over medium heat. Add 1 tbsp oil, 4 oz crab meat, 1 clove minced garlic, 1 tsp lemon juice and ¼ tsp old bay seasoning. Mix well in a pan and saute for a few minutes. Take out and set aside. Butter one side of the two slices of bread and place in pan. Place mozzarella cheese one each slice of bread, covering it as evenly as possible. Sprinkle a little salt over cheese. Layer 4 slices bacon, 2 slices tomatoes and cooked crab meat over one of the slices of bread. Cook until all the cheese is melted and bread is lightly toasted.