Natalie Powell's Knishes

Name: Natalie Powell's Knishes
Prep time: 30 min
Cook time: 50 min
Total time: 1 h 20 min
Cuisine: Israeli
Ingredients: 1 cube chicken bouillon; 1 tablespoon water; 2 tablespoons butter; 2 onions, diced; 3 large potatoes, peeled and cut into chunks; 1 egg; 1 clove garlic, minced; 0.25 teaspoon salt; 0.25 teaspoon ground black pepper; 4 cups all-purpose flour; 0.25 cup white sugar; 1 teaspoon baking powder; 0.66666668653488 cup vegetable oil; 2 eggs; 0.75 cup warm water; 1 tablespoon vegetable oil for brushing, or as needed