Put olive oil and butter in a 10-in. frying pan over medium-high heat. Cook until butter melts. Add garlic and salt and cook, stirring, until fragrant, 1 to 2 minutes. Add rice and cook, stirring, until rice is opaque. Add broth, stir, and turn heat to high. Bring to a boil, cover, reduce heat to low, and simmer undisturbed while rice absorbs liquid, about 15 minutes (then remove cover to check).
Remove cover, quickly add peas (leave peas on top, do not stir), and return cover. Take off heat and let sit 5 minutes. Remove cover, add parsley, and fluff with a fork. Serve hot, sprinkled with pepper to taste.
Note: Nutritional analysis is per serving.