In a large saucepan, heat oil over medium heat; cook onion, garlic, salt and pepper, stirring occasionally, until softened, about 5 minutes.
Stir in rice.
Add stock and lemon rind; bring to boil.
Reduce heat, cover and simmer until liquid is almost absorbed, about 15 minutes.
With fork, gently stir shrimp, swiss chard, dill and lemon juice into rice mixture; cover and cook until shrimp are pink and greens are wilted, about 5 minutes.
Serve with lemon wedges.
Variation: Vegetarian Rice and Greens: Omit shrimp, Replace chicken stock with veggie stock.
Serve sprinkled with 1/2 cup crumbled feta cheese it desired.