Preheat the oven to 425˚. Brush a 24-cup mini-muffin pan (preferably nonstick) with olive oil. Bring a large saucepan of salted water to a boil. Add the pasta and cook 2 minutes less than the label directs. Drain.
Combine the cream cheese, egg and garlic in a large bowl and whisk until smooth. Stir in the pasta, baby spinach, artichoke hearts, fontina, mozzarella, 1/2 teaspoon salt and a few grinds of pepper until well combined.
Fill the muffin cups with the pasta mixture. Toss the panko with the olive oil and a pinch of salt in a small bowl. Sprinkle over the pasta.
Bake until the pasta is golden around the edges, 15 to 20 minutes. Let cool 5 minutes, then remove from the pan.