Preheat oven to 400°. Place seasoning mix in a shallow dish and brush chicken with olive oil.
Place a sheet of aluminum foil on a cookie sheet and grease with nonstick cooking spray. Place chicken one at a time in the seasoning mix; coat both sides of each chicken breast with seasoning mix and place on aluminum foil.
Bake chicken uncovered for 10 minutes. Remove from the oven and turn chicken. Spoon marinara sauce over each piece of chicken and sprinkle with cheese.
Place chicken back in the oven for 5 more minutes to melt cheese. Garnish with parsley; serve warm with spaghetti.