Rinse blackeyed peas. Combine blackeyed peas and 5 C. of water in a 3-quart saucepan. Bring to a boil then remove from heat, cover and let stand for 2 hours. Drain water from blackeyed peas in a large strainer or colander and rinse out the saucepan. Combine garlic, celery, onion and green pepper in the saucepan and sweat over medium-low heat. Stir occasionally. After a minute or so add the okra and tomatoes and cayenne pepper. Continue cooking until the tomatoes become soft. Stir 2 C. of stock and blackeyed peas into the mixture and reduce heat to low. Simmer for 2 hours or until blackeyed peas are tender. Before serving add salt to taste.