Authentic, easy to make recipe for Mexican refried beans

Ingredients

• 4 slices of bacon, including fat, diced
• 1/2 cup of lard; olive oil or shortening can be substituted but the taste won't be authentic
• 1/2 onion, any variety, diced
• 2 cloves garlic, pressed
• 2 cups pot beans, or one 30-oz can of canned pinto beans drained of most of the liquid