Prep time: 10 minutes. Bake time: 35 to 45 minutes. Total time: approximately 45 to 55 minutes, plus cooling. Yield: 1 small loaf, approximately 8 slices. Oven temperature: 350°F (175°C). Use an 8 by 4-inch loaf pan lined with parchment paper. Ingredients: one 15-ounce can Great Northern beans, drained and rinsed; 4 large eggs; and 2 teaspoons baking powder. Optional seasonings: 1/4 teaspoon salt, 1/2 teaspoon garlic powder, and 1/2 teaspoon dried Italian herbs. Drain and rinse the beans thoroughly, then pat dry to remove excess moisture. Blend beans and eggs until completely smooth and creamy. Add baking powder and blend briefly. Stir in optional seasonings. Pour into the prepared loaf pan, smooth the surface, and bake for approximately 35 to 45 minutes until lightly golden and firm in the center. A toothpick should come out without wet batter, and the center should reach approximately 200°F (93°C). Cool in the pan for 10 minutes, then transfer to a wire rack and cool completely before slicing. This naturally flourless loaf has a moist, compact texture rather than the airy, stretchy crumb of conventional yeast bread. Toasting individual slices improves the surface texture and creates a pleasant golden finish. Serve with avocado, hummus, cream cheese, eggs, or other savory toppings. Great Northern beans have a mild flavor and creamy interior, making them suitable for this recipe. For strict gluten-free preparation, verify that the canned beans and baking powder are gluten-free and free from relevant cross-contact. Refrigerate the fully cooled loaf in an airtight container at 40°F (4°C) or colder for up to 4 days. Freeze individual slices with parchment between them for approximately 2 months for best quality. Avoid extended room-temperature storage because the loaf contains eggs and substantial moisture. Nutrition estimates assume 8 slices without optional seasonings or toppings and depend on the drained bean weight, egg size, baking powder brand, and portion size. The phrase high-protein describes the protein-containing ingredients rather than a verified regulatory nutrition-content claim.