There wasn't a cocktail or chocolate truffle to be found among the refreshments served at the Feb. 20 low-fat, low-cholesterol, low-salt preview screening of "My Heart, Your Heart," the story of television personality Jim Lehrer's heart attack and continuing rehabilitation. (The PBS show is scheduled for tonight at 8 p.m. on WETA and 10 p.m. on Maryland public television channels.) But there were plenty of fruit juices, muffins, vegetables and healthy sandwiches with which to splurge at the Georgetown University Hospital affair. Among the offerings, we thought that the following recipe, provided by Ridgewell's Michelle McQuaid, was appropriate for ushering out National Heart Month: ORANGE DATE CARROT MUFFINS (12 muffins) 1 cup all-purpose flour 2/3 cup whole-wheat flour 1/4 cup instant nonfat milk 1 teaspoon baking soda 1 teaspoon baking powder 1/8 teaspoon cinnamon 1/8 teaspoon mace 1 small thin-skinned orange, washed, blanched in boiling water 15 seconds and cut into eight sections 1 medium-size carrot, cut into 1-inch pieces 1/2 cup sugar 1 1/2 tablespoons polyunsaturated oil 1 1/2 cups water 1 egg white 1 teaspoon vanilla extract 1/3 cup pitted dates, coarsely chopped

Combine flour, milk, baking soda, baking powder, cinnamon and mace in a medium bowl. Stir thoroughly. Place all remaining ingredients in a blender, with the exception of the dates. Blend at medium speed 30 seconds. Scrape down and blend one minute. Add dates and blend 15 seconds, or until finely chopped.

Combine the dry ingredients with the blender mixture and pour into lined muffin tins. Bake in a 400-degree oven 20 to 25 minutes.