Line a 7x11 or 9x9-inch baking dish with aluminum foil, leaving a 1-inch overhang along each long side.
Mix 1 cup old-fashioned rolled oats, 1 cup unsweetened puffed rice cereal (preferably brown rice), 1 cup dried cranberries, 1/2 cup unsalted roasted peanuts, 1/2 cup unsalted shelled sunflower seeds and 1/4 cup chia seeds in large bowl.
Combine 3/4 cup unsalted peanut butter and 1/2 cup mild honey in small saucepan; stir over low heat until blended and smooth.
Stir in 1 tsp vanilla extract. Add to oat mixture; mix well.
Scrape into prepared baking dish; press firmly into an even layer.
Cover with plastic wrap and refrigerate at least 2 hours or overnight.
Use foil overhang to transfer bars to a cutting board.
Cut into 18 bars.
Bars will keep, covered, in the refrigerator for up to 2 weeks.
Yield: 18 (2 1/4x2-inch) bars.
Per serving: Calories: 190. Total fat: 10 grams. Saturated fat: 1.5 grams. Cholesterol: 0 milligrams. Sodium: 0 milligrams. Carbohydrates: 22 grams. Fiber: 3 grams. Sugars: 12 grams. Protein: 5 grams.
You may substitute other nuts for a slightly different flavor. Just toast them in a 350 degree oven to bring out the flavor.