Tempeh& Mushroom Stew On A Mashed Potato Bas

• 1 onion
• 1 garlic clove
• 1 tomato
• 1 bay leaf
• 170 gr mushrooms
• 110 gr potatoes (cooked)
• 85 gr tempeh
• 80 ml water
• 16 ml soy sauce
• 16 ml vegetable oil