Fried mashed potato tacos, warm the tortilla, fill with mashed potatos, fry then dry oil, open n fill with shredded cheese

Spaghetti

if you like rice mixed with chicken or sausage or something you could buy that pretty cheap or there's dinner in a box.
I like to buy chicken flavored rice, a pack of boneless skinless chicken breasts, a can of corn and combine in a skillet as a meal.
you could buy jumbalaya not sure of the spelling, and buy the sausage to put in it pretty cheap
the box dinners are like 4 dollars for a box that is 4 servings.