Add ground beef to the skillet; cook until almost no pink remains, 5-7 minutes, breaking it up with a wooden spoon as it cooks. Add onion and carrot; cook until the onions are translucent and carrots have started to soften, 4-5 minutes. Stir in garlic, sage, thyme, salt and pepper; cook until fragrant, 30-60 seconds. Stir in flour; cook until lightly browned, 1-2 minutes. Gradually pour in the beef broth, stirring constantly until a smooth sauce develops. Stir in tomato paste, Worcestershire and Dijon. Stir in peas and toasted gnocchi. Simmer until thickened and warmed through, 2-3 minutes.