Sour Cream Chili Bake

• 2 baking
• 1 taco seasoning mix (envelope)
• 550 gr corn chips
• 500 gr kidney beans (drained)
• 450 gr beef (ground)
• 425 ml tomato sauce
• 300 ml sour cream
• 90 gr cheese
• 75 gr corn chips in bottom
• 30 gr onion (chopped)