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1
Place the rice in a large microwave-safe bowl and add 1 cup water.
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2
Cover with plastic wrap, pierce with a knife a few times to vent, then microwave until the water is almost absorbed, 10 minutes.
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3
Uncover and fluff the rice with a fork; let cool completely.
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4
Lightly beat 1 egg in a small bowl.
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5
Add to the bowl with the rice along with the lamb, beef, provolone, onion, half each of the mint and parsley, the marjoram, garlic, allspice, 1 teaspoon salt and 1/2 teaspoon pepper.
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6
Mix with your hands until just combined (do not overmix); cover and refrigerate 30 minutes.
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7
Dampen your hands and form the meat into 18 balls (about 1 1/2 inches each).
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8
Bring the chicken broth to a boil in a large pot or Dutch oven.
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9
Add the meatballs, cover and cook over medium heat until tender, about 30 minutes, turning halfway through.
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10
Whisk the remaining 2 eggs and the lemon juice in a small bowl until frothy.
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11
Remove 1 cup broth from the pot and gradually whisk it into the egg mixture.
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12
Push the meatballs to one side of the pot; reduce the heat to low and pour the egg mixture into the other side.
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13
Cook, stirring gently, until the sauce thickens slightly, about 4 minutes.
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14
Remove from the heat and stir in the remaining mint and parsley; season with salt and pepper.
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15
Serve the meatballs and sauce in shallow bowls.
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16
Top with arugula, drizzle with olive oil and season with salt and pepper.
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17
Photograph by Christina Holmes