Remove beards on mussels, and scrub shells with a brush. Discard opened, cracked, or heavy mussels (they're filled with sand). Set remaining mussels asideM1
Coat a large nonstick skillet with cooking spray; add oil.
Place over medium-high heat until hot.
Add garlic; saute 1 minute.
Add tomato, water, and wine; bring to a boil. Reduce heat; simmer, uncovered, 20 minutes. Stir in chopped parsley, salt, and pepper.
Add mussels. Cover and cook 5 minutes or until mussels open; discard unopened mussels.