1. Wash jar in soap and hot water. Rinse in hot water very thoroughly. Invert to drain. 2. Prepare green beans by trimming ends. Bring a large pot of water to a rapid boil. Drop in green beans and cook for 2 minutes. Drain well and immediately run under cold water to preserve the color. 3. Place 3 dill sprigs (thick stems removed) in bottom of jar. Add garlic cloves, cayenne pepper and dill seeds. 4. Tightly pack the jar with green beans, trying to keep them standing upright for an attractive presentation. 5. Fill the jar halfway with vinegar, then fill to within 1/2 inch of top with boiling water. Seal the jars tightly and let cool, then refrigerate. Wait at least 24 hours before serving. Serve chilled.