A balanced meal has three jobs: give you energy, give you building blocks, and keep you full until the next one. You can hit all three without counting a single calorie.
Here's the template.
The Three-Part Plate
Split the plate in three. Half vegetables and fruit. A quarter protein. A quarter starch. That's the whole system.
This is a rule of thumb, not a measured formula. It works because it makes portion sizes sort themselves out before you have to think about them.
The half-vegetable rule does the heavy lifting. Vegetables are mostly water and fiber, so they add volume without adding much energy. You eat the same weight of food and feel fuller for longer.
Vegetables and Fruit: Half the Plate
Aim for 1 to 2 cups of vegetables at a main meal — cooked or raw, whichever you'll actually eat. Leafy greens are light; 2 cups of raw spinach cooks down to a spoonful, which is fine. Denser things like broccoli, squash, or carrots get you there faster.
Fruit counts toward the same half, but keep it to a piece or a cup. A whole orange beats orange juice for the same reason a chicken breast beats a protein shake: it takes longer to eat and comes with fiber attached.
Protein: A Palm, Not a Pile
Protein is the part most people get wrong, usually by eating almost none at breakfast and far too much at dinner. A serving that fits in your palm — roughly 20 to 30 grams — is plenty at any meal.
For daily totals, 0.8 grams per kilogram of body weight is the official recommended daily allowance. Treat that as a floor, not a target. If you lift weights, train regularly, or you're over 60, a range you'll see often is 1.2 to 1.6 grams per kilogram. That range is a rule of thumb, not a precise measurement of what your body needs. For a 70 kg person, it works out to 84 to 112 grams a day.
Eggs, chicken, fish, beans, lentils, tofu, Greek yogurt, cottage cheese. Mix them.
Starch: One Cupped Hand
Rice, potatoes, bread, pasta, oats, tortillas. A cupped hand or a fist is the serving. If you're training hard or you're a bigger person, go to two. If you sit at a desk all day, one is enough.
Whole grains are better than refined ones, but that gap is smaller than the gap between a home-cooked meal and a drive-through. Don't agonize over brown versus white.
Fat: A Thumb
Olive oil, butter, avocado, nuts, cheese. A thumb-sized amount