Preheat the oven to 350 degrees. Using a food processor, grind the almonds to the texture of fine breadcrumbs.
In a medium bowl, using a potato masher, coarsely mash the chickpeas with the eggs, lemon zest, 1/4 tsp. salt and 1/4 tsp. pepper. Stir in the mozzarella and almonds.
Line a rimmed baking sheet with foil or parchment; coat lightly with EVOO. Form the mixture into 12 golf-ball-size meatballs and place on the baking sheet. Drizzle with a little EVOO. Bake until golden and firm, 25 to 30 minutes.
Meanwhile, in a small saucepan, heat the pasta sauce until warmed through. Cut the baguette crosswise into 4 pieces. Split the pieces lengthwise and scoop out a little bread. Brush the baguette lightly with EVOO; toast.
To serve, line the bottom pieces of the bread with the spinach. Spoon on a little bit of the warmed sauce; top with the meatballs and remaining sauce.