Sunday is my day to prepare my breakfast and lunch for the week at work. I scramble eggs or hardboil them, boil sweet potatoes, and also bake some chicken for the week. I've cut back on red meat and ground beef though it is cheaper.
Each year I've seen the onslaught/encroachment of age and how much more necessary it is to cut back on drinking, eating empty food, or even being lazy and not eating much after hard training sessions and overall to ensure that sleep and diet ALLOW me to maximize my training.
How to eat Healthy for BJJ (for close to) Under $50 per week:
Some other nutrient dense/super easy foods to pre-make/prepare for the week: