Add zucchini, carrots, peppers and garlic; cook until crisp-tender, stirring frequently. Stir in 1 cup of the broth; bring to boil.
Stir in rice; return to boil. Reduce heat to medium; cook and stir 5 minutes or until liquid is almost absorbed.
Add 1 cup of the remaining chicken broth; cook 10 minutes or until broth is completely absorbed, stirring occasionally. Repeat with remaining broth until all broth has been added.