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1
Sprinkle 1 teaspoon salt over the eggplant cubes and place on paper towels.
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2
Let stand for 1 hour.
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3
Rinse and drain.
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4
Heat 2 teaspoons of the olive oil in a large nonstick skillet.
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5
Add the eggplant and saute until half cooked, about 4 minutes.
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6
Using 8 metal or bamboo skewers that have been soaked in water, skewer the tuna, peppers, onion and eggplant pieces, alternating colors and dividing the ingredients evenly among the skewers.
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7
Combine the remaining 2 tablespoons olive oil, lemon juice, basil and salt and pepper to taste in a shallow dish.
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8
Place the skewers in the dish and turn to coat in the marinade.
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9
Cover with plastic wrap and refrigerate for 30 minutes, turning from time to time.
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10
Preheat a grill or broiler.
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11
Remove the skewers from the marinade and grill until tuna begins to char on the outside but is still pink in the center, about 2 minutes per side (about 8 minutes total).
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12
Heat a medium-size skillet over medium-high heat.
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13
Add the spinach and cook until just wilted.
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14
Divide among 4 plates.
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15
Spoon the hot rice beside the spinach and top both with 2 skewers per plate.
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16
Serve immediately.