1, the main ingredients: tenderloin 250 grams, pineapple a few small pieces, 1 potato.

2, auxiliary ingredients: 5 grams of green onion, 3 cloves of garlic, 5 grams of ginger, 1 tablespoon of cornstarch, salt, 1 teaspoon of redcurrant powder, 2 tablespoons of tomato sauce, half a tablespoon of sesame oil, 1.5 tablespoons of vinegar, 1 tablespoon of sugar, 1 tablespoon of soy sauce, 5 tablespoons of watercolor.

3. Peel the potatoes and cut into chunks, cut the pineapple into small pieces, and dice the green onions, ginger and garlic.

4, tenderloin cut slightly thicker slices, in the top of the cross knife. Do not cut through. With red currant powder, starch, moderate salt, a little water to wet, scratch well.

5, the pot of oil is hot, about 60%. Put the tenderloin piece by piece into the small fire fry through. Until the meat rolled up, cooked through, you can fish out, continue to heat the oil, repeat frying again, so that the surface of the meat crispy, pour out the filter oil.

6, the potatoes are also fried through.

7, in advance with 2 spoons of tomato sauce, 1 spoons of soy sauce, 5 spoons of water starch, 1 spoons of sugar, half a spoon of sesame oil, 1.5 spoons of vinegar, mix a bowl of sauce.

8, frying pan to stay the bottom of the oil, popping onion, ginger and garlic, pour into the sauce, pour into the fried pork, potatoes. Pineapple also put in together, stir fry evenly so that each piece of meat are wrapped in gravy. Finally, then scoop a spoonful of hot oil poured on, quickly turn, out of the pan.