Heat oven to 425° F. Rub all sides of pork tenderloin with olive oil and place on rack in shallow roasting pan. Sprinkle 1 teaspoon Italian seasoning, 1/2 teaspoon garlic powder, salt and pepper evenly over tenderloin.
Roast 25-30 minutes per pound until internal temperature reaches 150° F. Remove pork tenderloin from oven and let stand 5-10 minutes. Cut into thin slices.
In small bowl, mix together ricotta cheese, remaining Italian herb mix, remaining garlic powder and onion powder until well combined. Set aside.
Place baguette slices on large baking sheet and bake 2-4 minutes per side while pork tenderloin is standing.
To assemble, spread about 1 tablespoon ricotta cheese mixture on one side of each baguette slice; top with thin slices of pork. Garnish with drizzle of balsamic glaze and parsley.