Start by preheating the oven to 350*F. Wash your sweet potatoes, removing any roots or eyes and scrubbing away any dirt.
Poke sweet potatoes with a fork to create steam holes around the potato (to prevent them from exploding), and par-cook/microwave on HIGH for 3 minutes, or until slightly soft. Repeat for each potato left.
Line a baking sheet with foil and cut potatoes in half length-wise, coating the cut sides with olive oil, salt & pepper, garlic powder, or other spices (to taste). Place in the oven and roast for 20-40 minutes, depending on size and girth of potato.* They are done roasting when they get slightly golden brown around the top edges and are really soft when a fork is inserted.
Put potatoes cut sides together and individually wrap and set aside on a kitchen towel (one piece of tin foil per potato). They will stay hot until we need them later!
Next, wash and chop up mushrooms into small, 1/4" pieces and set aside in a large bowl. Wash and tear/chop the spinach into smaller pieces as well, and place in the bowl with the mushrooms. Finely chop garlic and basil and place into separate small bowls to use later. Cut up chicken breast into chicken nugget sized pieces, working to keep all of them about the same size.**
Pour 3-4 tbs. of olive oil (enough to coat the bottom) in a large saute pan, adding 3/4 of the basil and all of the garlic over medium heat. Let the basil and garlic saute and simmer for about 5 minutes or until garlic begins to become aromatic and brown slightly.
Add in the chicken to the garlic-basil infused olive oil mixture, cooking for about 7-10 minutes, or until there is no pink on the chicken left and the thickest piece reads 165*F on a thermometer. Transfer just the chicken to a separate bowl and cover with foil.
Add in mushrooms and spinach mixture, increasing to medium-high heat, and season with salt and pepper. Add more oil if more moisture is needed. Cook veggies until there is barely any liquid left (approx. 10-15 mins) , transferring and mixing into the chicken we placed in the bowl from the previous step.