Grind saffron strands to a fine powder (if not purchased powdered); mix with 3 tablespoons water; set aside (this is called “blooming”).
Place oil, garlic and onion in a medium saucepan over medium-high heat; stir continously until the onion softens; ~ 2 minutes
Add rice and saffron liquid to saucepan; mix well.
Stir in broth, bay leaf, and lime zest; bring to a bubbly boil.
Reduce heat to low; cover and simmer ~20 minutes.