Creamy Cucumber Tomato Salad

Bahan-bahan (6 porsi)

• 3 medium tomatoes
• 1 English cucumber (or 3-4 small cucumbers)
• 1/2 medium onion
• 1 large garlic clove
• 4 Tbsp sour cream
• 1 Tbsp mayonnaise (optional)
• 1/8 tsp pepper
• salt to taste