I eat the same dietitian-approved lunch almost every day. It's got fiber and protein — and is a breeze to prep in advance

My husband and I eat the same lunches nearly every single day during the week.

Rachel Hosie I meal-prep the same protein- and fiber-rich lunch for my husband and me every single week.

Because I mix up the ingredients, dressings, and seasonings for the grain bowls, they never get old.

The nourishing bowls are Mediterranean diet-friendly and help me follow the 80/20 principle .

When I lived in a big city, I used to love treating myself to lunches at trendy salad spots.

Although these take-out meals were tasty, they were terrible for my wallet.

I've since turned into an avid meal-prepper and frequently make my own lunch — almost always a fiber- and protein-packed grain bowl — for a fraction of the price.

The recipe I use aligns with the 80/20 nutrition principle I follow, meaning I eat nutrient-dense foods 80% of the time and don't worry about nutrition for the other 20%.

The grain bowls are so nourishing that I feel relaxed about occasionally going out for a slightly less nutrient-dense lunch, since I know I'm hitting my nutrition goals most of the time.

Here's how to make the go-to lunch that helps me stay on track.

These grain bowls are easy to prep and customize The grain bowls are nearly impossible to mess up and highly customizable.

Rachel Hosie I play around with the ingredients I put in my grain bowls every week, but they always follow the same formula: My grain-bowl ingredient checklist: Grains, such as quinoa, wholegrain rice, or buckwheat Beans or legumes, such as chickpeas, edamame, or lentils A protein source, such as tofu or chicken Raw vegetables, such as chopped cucumber, tomatoes, beetroot, or scallions Roasted vegetables, such as butternut squash, bell peppers, cauliflower, broccoli, or zucchini A flavorful add-in, such as crumbled feta, avocado, or hummus Greens, such as lettuce or spinach Spices and herbs of choice Seeds and nuts of choice A dressing of choice The recipe is flexible, so there's no need to add ingredients in a specific order.

It's truly hard to mess up.

You can also adjust the quantity based on your needs.