Cut swordfish in half, remove any bones you see, and brush with 2 TB of olive oil. Refrigerate till ready to use.
Heat oven to 400 degrees.
Make tomato sauce:
Heat the 2 tb olive oil in saucepan, over med heat. Add garlic and onion and cook till garlic is golden and onion is soft (careful not to burn garlic!)
Stir in tomatoes, wine, oregano, and season with salt and pepper. cover and cook over medium heat for 15 minute If you want a smooth sauce blend or puree in a blender or food processor. If not leave it be.
Combine bread crumbs, capers, garlic, parsley, salt and pepper in a bowl. Add 2 tablespoons of the olive oil and mix well, to a make a paste like mixture.
Place each swordfish steak between two pieces of wax paper and pound gently to 1/4 inch thickness.
Place one-eighth of the bread-crumb mixture near one end of each piece of fish and roll it up as neatly as possible, tucking in the ends. Secure with toothpicks.
Heat remaining 4 TB olive oil in ovenproof skillet/pan. Brown swordfish over medium-high heat. After 3-4 min pour tomato sauce over and place in oven and bake for 15 min, occasionally basting with sauce. Garnish with lemon wedges and basil leaves.