Brush each piece of chicken with olive oil; sprinkle with salt and 1/4
teaspoon oregano.
Cook chicken in a grilling skillet or lightly greased nonstick skillet over
medium-high heat about 4 minutes on each side or until done. Set chicken
aside.
Combine pizza sauce, basil, and remaining 1/4 teaspoon oregano in skillet;
cook over medium-high heat until thoroughly heated.
Remove from heat; add chicken, and keep warm.
Place rolls on a baking sheet; spread sauce evenly on bottom half of each
roll; top evenly with chicken, zucchini, and cheeses.
Broil 3 inches from heat (with electric oven door partially open) 2 to 3
minutes or until cheese melts. Cover with tops of rolls.