Place peppers, onion slices and whole tomatoes on a foil lined baking sheet. Roast in a 300 degree oven for approximately 20 minutes or until items show browning or slight charring. Blend half of the peppers, 1 tomato and garlic cloves in a blender (low speed). Add remaining peppers, onion slices, tomato and salt. Use lowest blender speed to blend into a chunky salsa. Pour into bowl and serve with tortilla chips. Heat index will vary by strength of peppers. Very useful to spice up meat dishes or soups. Keeps well in fridge for 7-10 days.