1. Combine cheese and milk to form a spreadable (but not wet) consistency. Spread about 1 teaspoon of the mixture evenly over each baguette slice.
2. Cook prosciutto in a nonstick skillet, stirring frequently over medium heat until crisp (about 5 minutes). Transfer to a paper towel to drain.
3. Place 1 pear wedge on each baguette slice; arrange attractively on a serving platter. Sprinkle prosciutto over appetizers.