chili con queso

Ingredients

• 1/2 cup finely chopped onion
• 1 tbsp butter
• 2 medium tomatoes, peeled ,seeded and chopped
• 4 oz can green chili peppers, rinsed, seeded and chopped
• 1/4 tsp salt
• 1 cup shredded cheddar cheese (4 oz)
• 1 cup shredded monterey jack cheese (4 oz)
• 1 milk
• 1 tortilla chips