When I go to the grocery store or farmer's market, I try to switch up what I normally buy. If I ate spinach last week, I'll buy kale this week. I'll get walnuts instead of almonds or quinoa instead of rice. I try to eat what's in season locally too.
Eating a variety of whole foods is beneficial for your health. Foods contain different types and amounts of minerals, vitamins, antioxidants, and phytonutrients. For example, tomatoes contain lycopene, carrots contain beta-carotene, collards contain calcium, and egg yolks contain Vitamin D.
So this week when you're perusing through the grocery store, fill your cart with foods you don't normally buy. Buy colorful foods like radishes, butternut squash, avocado, purple potatoes, beets, blueberries or salmon. This will break up the monotony of dishes you usually make. It begs for you to be creative in the kitchen. You'll enjoy it and I'm sure those you're feeding will too.
An example of a colorful meal is my lunch from last Friday. It consisted of lentils (good source of non-heme iron), brazilian collards (great source of calcium and magnesium), and roasted sweet potatoes (full of carotenes).
Red lentils cooked with yellow onion, ginger, curry, allspice
Brazilian collards the greens were thinly sliced, so they cooked quickly with oil and garlic
Sweet potatoes roasted with coconut oil and cumin seeds