Stuffed Mexican Meatloaf

• 2 3/4 loaf (pan)
• 1 egg
• 1 cherry tomatoes
• 1/2 meat mixture in
• 900 gr beef chuck (ground)
• 230 gr cheddar cheese (shredded)
• 120 ml sour cream
• 60 gr taco seasoning mix (plus)
• 45 gr green pepper (chopped)
• 40 gr onion (finely chopped)