1. Preheat broiler.
2. Combine pears and lemon juice in a small bowl; toss to coat.
3. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add pears; cook 6 minutes or until tender, stirring frequently. Remove from heat. Combine cranberries, 1 tablespoon sugar, flour, and salt in a small bowl; toss to combine. Add cranberry mixture to pan; stir to combine.
4. Combine remaining 2 tablespoons sugar, oats, and cinnamon in a small bowl; toss to combine.
5. Coat 4 (6-ounce) ramekins with cooking spray; place on a baking sheet. Place 1/2 cup pear mixture into each of 4 (6-ounce) ramekins. Top each with 2 tablespoons oat mixture; drizzle each with 1 teaspoon butter. Broil 3 minutes or until golden brown.