Whether serving a few guests or a large gathering, any time is a good time to promote beef's many nutritional benefits. Did you know that it would take seven servings of chicken breasts to equal the immunity-boosting zinc in one serving of beef? It would take 3 cups of raw spinach to equal the iron in one serving of beef. Also, one 3-ounce serving of beef provides 50 percent of the recommended daily allowance for protein.