Vietnamese Pork "spaghetti Sauce" Over Rice

• 5 tomatoes
• 2 serrano chiles
• 400 gr pork (ground)
• 200 gr shallots
• 350 ml chicken stock
• 65 ml vietnamese style fish sauce
• 65 gr tomato paste
• 34 gr garlic
• 22 ml lime juice
• 22 ml fish sauce