Heat 1T olive oil in large skillet over medium-high heat. Cut chicken in half, lengthwise; season with pepper and 1/4 tsp salt and add to skillet.  Brown chicken and cook until no longer pink; approximately 3-4 minutes per side. Place chicken aside, covered. Add cut mushrooms in half and cook them in skillet used for chicken; cook 2-3 minutes; transfer to chicken platter.

Dice onion and add to skillet; add more oil if needed. Cook until it becomes opaque; 5-7 minutes. While onions cook, chop and remove seeds from tomatoes. Add to skillet along with minced garlic and bay leaf. Cook for 8 minutes; add chicken broth rice, chicken, mushrooms, beans and saffron. Boil then simmer, uncovered, 20-25 minutes; until rice has absorbed water. Allow to rest for 10 minutes before serving over bed of spinach and pineapple.