**Specific Meal Proposal:**

Given these objectives and your dietary preference for potato, butter, and cheese, here's an example 'Lunch' meal plan:

- Baked Potato: Medium-sized (~173g), 161 Calories
- Butter: 1 tbsp, 102 Calories
- Cheese: Cheddar, 1 ounce (~28g), 113 Calories

This totals approximately 376 calories. In order to reach the '1000'-calorie target, adjustments to portion sizes need to be made. The following adjusted meal plan meets this requirement more closely while maintaining a balanced nutrient profile:

- Baked Potato: Medium-sized (~173g), 3 servings, 483 Calories
- Butter: 1 tbsp, 2 servings, 204 Calories
- Cheese: Cheddar, 1 ounce (~28g), 3 servings, 339 Calories

Total 'Lunch' calories = 1,026 Calories

Nutritional Breakdown:

- Fat: From butter and cheese, approximately 85g, which is about 19% of the meal's total calories
- Carbohydrates: Mostly from potatoes, approximately 150g, which will make up about 58% of the meal's total calories
- Protein: From both the cheese and potato, approximately 25g, reaching about 22% of the meal's total calories.

Keep in mind that the meal's total calories slightly exceed the 1000-calorie target, but this is within a reasonable margin of error. It's also crucial to incorporate protein and fiber-rich vegetables for a balanced nutrient profile. This meal plan can be adjusted further according to your preferences.
