1. Heat a large nonstick skillet over medium heat. Add pancetta to pan; cook 4 minutes or until browned, stirring occasionally. Remove pancetta with a slotted spoon, reserving drippings in pan.
2. Add leek and garlic to drippings in pan; cook 5 minutes, stirring occasionally. Combine stock and flour, stirring with a whisk. Add stock mixture to pan; bring to a boil. Add cream cheese and thyme; stir until cheese melts.
3. Knead rice pouches to separate grains. Stir rice, salt, and pepper into pan; simmer 8 minutes or until sauce is thickened and creamy. Gradually add spinach, stirring until spinach wilts. Remove from heat; stir in Parmigiano-Reggiano. Sprinkle with pancetta.