Grilled chili flank steak with tomatillo-pineapple salsa

Ingredients:
1 lb beef flank steak
1 Tbs olive oil
1 tsp chipotle powder
4 slices fresh pineapple (canned in juice may be used)
1 large red bell pepper, diced
1/2 red onion, diced
1/4 cup cilantro, chopped
juice of 1 lime

Instructions:
Prepare the grill, or turn the broiler on high.
Mix oil and chipotle powder together in a small dish.
Brush onto both sides of the steak.
Grill for around 5 minutes on one side, and 3 more minutes on the other. Or, broil 3 minutes on one side, and 2 minutes on the other.
Remove to a plate, cover and let rest for 10 minutes.
Grill the pineapple rings for 2-3 minutes per side (or broil for 45 seconds to 1 minute per side).
Cut the pineapple into small chunks and place in a medium bowl.
Add red bell pepper, red onion, cilantro and lime juice and mix together.
Slice the steak thinly, and serve with pineapple salsa.