Upo Guisado Omelet

Name: Upo Guisado Omelet
Ingredients: 2 Tablespoons vegetable oil; 2 cloves garlic minced; 1 whole onion chopped; 1 Tablespoon patis (fish sauce) fish sauce; 1 whole large tomato chopped, about 3/4 cup; 1/2 cup organic vegetable broth; 2 cups cubed upo (bottle gourd) cut about 1/2-inch sized pieces; 1 cup sliced green beans cut into 1-inch in length pieces; 4 whole large eggs beaten; 1 teaspoon salt; 1 teaspoon ground black pepper powder; 1 to 2 stalks scallions chopped, for garnish