Step 1

Combine first 7 ingredients in medium bowl; whisk to blend well. Pour into heavy jumbo resealable plastic bag. Add ribs; seal bag. Turn bag over several times to coat ribs evenly. Refrigerate overnight, turning bag occasionally.

Step 2

Prepare barbecue (medium-high heat). Drain ribs; discard marinade. Working in batches, grill ribs until browned and cooked to medium-rare, about 3 minutes per side. Mound ribs on platter; surround with chopped spinach and serve.