Hearty Cornbread

• 10 cast iron skillet
• 2 garlic (cloves)
• 1 onion
• 240 ml sour cream
• 190 gr cornmeal
• 120 ml sun tomatoes in oil (dried)
• 55 gr butter
• 4 gr basil leaves (fresh)
• 2 gr baking soda
• 1 gr black pepper