Creamy Tomato Pasta

Ingredients
• 10 oz Penne Pasta
• 3 TBSP Olive Oil
• 1/2 Onion
• 3 Cloves Garlic
• 2 TBSP Butter
• 3 TBSP Tomato Paste
• 1/2 Can Tomato Sauce
• 1/2 TBSP Sea Salt
• 1 TSP Black Pepper
• 1 TBSP Oregano
• 250 ml Milk
• 150 Sour Cream
• 1 TBSP Parmesan Cheese
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