How do i prevent myself losing weight while building muscle?

Eat healthy high : Calorie foods. Eat 6 meals/day. Consider foods like: almonds, cashews, pecans, sunflower seeds, flax seeds, walnuts, hummus, avocados, granola, trail mix, dried fruits, extra virgin olive oil, canola oil, protein shakes, protein bars, lean meats, poultry, fish, smoothies (w added silken tofu or powdered milk), greek yogurt (full –fat), .