Not sure if i understand your question. But if you are asking what food will provide you with enough minerals to meet all you mRDAs, well the answer is none. There is No One food that can do that. And things like Potassium and Magnesium are very "bulky" minerals. So its hard to do with supplements. And since some of those minerals are not water soluble, if you take supplements you put your self at risk for "overdoing" it. Some of those minerals are toxic in large amount.
The best advice is to eat a large amount and a large variety of whole plant foods.
One strategy is called Eating Around the Rainbow. This is taught to kids in Canada. Red, Orange/yellow, Green, Blue/purple, and White/brown. Just make sure you eat a food from each color group each day.
Another strategy is Dr. Gregers Daily Dozen checklist. Just make sure you meet the requirements for each day.
Getting back to your question. Just using potassium as an example. You need 3 - 4 grams of potassium a day. That would be a pretty big pill. Or 6 or more bananas. But you can also get your RDA of potassium by eating beans (white/brown), Beets (red), bananas (orange/yellow), and Spinach (green).
The mRDA of magnesium is only half a gram a day. but supplement companies are wary of putting magnesium in a supplement because too much can cause adverse health effects. But good sources of magnesium are whole grains, beans, and nuts, (white/brown), and leafy green veggies (green).