Spicy Shrimp without cream

2 lbs. medium shrimp 2 tbs.'s olive oil 1 onion , chopped 1 green bell pepper , chopped 1/2 red bell pepper , chopped 2 stalks celery , chopped 2 tsp.'s[...]

3 tablespoons vegetable oil 2 cups julienne celery 2 onions, chopped 4 cloves crushed garlic 1 teaspoon white sugar 2 tablespoons all-purpose flour 1 teaspoon[...]