In 1-quart saucepan, place eggs. Cover with cold water 1 inch above eggs. Heat to boiling; remove from heat, then cover and let stand 18 minutes. Meanwhile, melt butter in 3-quart saucepan over medium heat. Remove stems from radishes, then cut radishes into 1/2-inch pieces. Add to saucepan along with thyme, and cook about 8 minutes, stirring occasionally, until tender.