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1
Position a rack in the center of the oven and preheat the oven to 400F.
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2
Lightly grease a roasting pan with olive oil.
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3
Squeeze the juice from the lemon into a bowl filled with 1 quart water and drop the rinds into the bowl.
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4
One at a time, trim the artichokes: Snap off the thick dark green leaves until you reach the inner core of thin light green leaves; discard the leaves.
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5
Using a sharp knife, cut off the core of leaves where it meets the heart (there is often an indentation at this point), to reveal the heart.
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6
Using a dessert spoon, scoop out the fuzzy choke.
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7
Using a sharp paring knife, trim off all the dark green skin from the artichoke heart and stem.
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8
Place the trimmed artichoke hearts in the lemon water as you go.
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9
Drain the artichokes and toss with the oil in the roasting pan.
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10
Add 1/4 cup hot water and cover tightly with aluminum foil.
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11
Roast for 20 minutes.
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12
Remove the foil and continue roasting until the artichokes are tinged with gold and tender when pierced with a knife, 15 to 20 minutes.
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13
Let the artichokes cool, then cut into 1/2-inch cubes.
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14
Squeeze the softened flesh from the garlic skins into a medium bowl.
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15
Mash the garlic with a fork.
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16
Stir in the chopped artichokes, ricotta, Parmesan, bell pepper, and basil.
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17
Season with salt and red pepper flakes.
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18
Cover tightly and refrigerate until chilled, at least 1 hour, or up to 2 days.
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19
Transfer to a serving bowl and serve chilled.