Cut stems off artichokes
Peel off tough outer leaves to reveal yellow-green hearts
Cut artichokes into quarters
Combine 1/4 cup lemon juice with 2 cups water in a medium bowl
Add artichokes to lemon water and toss to prevent discoloration
Drain
Steam artichokes until tender, about 20 minutes
chill
In a large pot, bring 2 quarts water to a rapid boil
Add 1 teaspoon salt and penne
Cook penne until al dente, about 10 minutes
Drain and rinse with cold water
To make salad dressing: combine tomato juice, olive oil, lemon juice, garlic, parsley, basil, salt and pepper in a food processor or blender and puree for 30 seconds
Toss together artichokes, penne, capers, olives and feta cheese in a large bowl salad bowl
Pour dressing over and toss well