MIX dressing and soy sauce with wire whisk until well blended. Toss chicken with 3 cups of the dressing mixture (or 1 Tbsp. for trial recipe). Cover and refrigerate until ready to use. Refrigerate remaining dressing mixture separately until ready to use.
FOR each pizza: Place 1 pizza crust on parchment-lined sheet pan; brush with 1/2 tsp. oil. Top with 2 tsp. of the dressing mixture, spreading to within 1/2 inch of edge of crust. Spoon 1 Tbsp. of the pineapple evenly over crust. Starting at center of crust, arrange about 6 chicken strips and 6 pepper strips in alternating rows over pineapple; sprinkle with 2 tsp. onion.
BAKE at 425°F-conventional oven for 10 to 12 minutes or until pizza is heated through and crust is golden brown.